<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script>
		    var arr=["龙","蛇","马","羊"];
		    var str=arr.join("爱");
		    alert(str);
		</script>
	</body>
</html>
